//
//
//  Copyright (C) skywalkerwei.
//
//
//	Permission is skywalkerwei granted, free of charge, to any person obtaining a copy
//	of this software and associated documentation files (the "Software"), to deal
//	in the Software without restriction, including without limitation the rights
//	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
//	copies of the Software, and to permit persons to whom the Software is
//	furnished to do so, subject to the following conditions:
//
//	The above copyright notice and this permission notice shall be included in
//	all copies or substantial portions of the Software.
//
//	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
//	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
//	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
//	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
//	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
//	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
//	THE SOFTWARE.
//

#import "UIWindow+HW.h"

@implementation UIWindow (HW)

+ (UIWindow *)hw_mainWindow
{
    return UIApplication.sharedApplication.keyWindow;
}

+ (UIViewController *)hw_visibleViewController
{
    UIViewController *topController = [UIApplication sharedApplication].keyWindow.rootViewController;
    
    while (topController.presentedViewController)
        topController = topController.presentedViewController;
    
    return topController;
}

+ (UIViewController *)hw_optimizedVisibleViewController
{
    return [self hw_visibleViewControllerWithRootViewController:[UIApplication sharedApplication].keyWindow.rootViewController];
}

+ (UIViewController *)hw_visibleViewControllerWithRootViewController:(UIViewController*)rootViewController
{
    if ([rootViewController isKindOfClass:[UITabBarController class]])
    {
        UITabBarController *tbc = (UITabBarController*)rootViewController;
        return [self hw_visibleViewControllerWithRootViewController:tbc.selectedViewController];
    }
    else if ([rootViewController isKindOfClass:[UINavigationController class]])
    {
        UINavigationController *nvc = (UINavigationController*)rootViewController;
        return [self hw_visibleViewControllerWithRootViewController:nvc.visibleViewController];
    }
    else if (rootViewController.presentedViewController)
    {
        UIViewController *presentedVC = rootViewController.presentedViewController;
        return [self hw_visibleViewControllerWithRootViewController:presentedVC];
    }
    else
    {
        return rootViewController;
    }
}

@end
